diff --git a/app/resources/img/grade4.png b/app/resources/img/grade4.png
deleted file mode 100644
index 6991b9d..0000000
Binary files a/app/resources/img/grade4.png and /dev/null differ
diff --git a/app/resources/img/grade5.png b/app/resources/img/grade5.png
deleted file mode 100644
index 872ed88..0000000
Binary files a/app/resources/img/grade5.png and /dev/null differ
diff --git a/app/views/HomePage/GradeItem/index.tsx b/app/views/HomePage/GradeItem/index.tsx
index 8591dbb..2b8a552 100644
--- a/app/views/HomePage/GradeItem/index.tsx
+++ b/app/views/HomePage/GradeItem/index.tsx
@@ -7,8 +7,6 @@ import Ecd from '#resources/img/ecd.png';
 import Grade1 from '#resources/img/grade1.png';
 import Grade2 from '#resources/img/grade2.png';
 import Grade3 from '#resources/img/grade3.png';
-import Grade4 from '#resources/img/grade4.png';
-import Grade5 from '#resources/img/grade5.png';
 
 import routes from '#base/configs/routes';
 
@@ -21,8 +19,6 @@ const gradePreviewMap: {
     GRADE_1: Grade1,
     GRADE_2: Grade2,
     GRADE_3: Grade3,
-    GRADE_4: Grade4,
-    GRADE_5: Grade5,
 };
 
 export interface Props {